Alg2 H Unit Circle (sin/cos)

cos(60°)

• $0$

• $1$

• $\frac{\sqrt{3}}{2}$

• $\frac{1}{2}$

sin 7π/6

• $\frac{1}{2}$

• $-\frac{1}{2}$

• $\frac{\sqrt{3}}{2}$
  

• $-\frac{\sqrt{3}}{2}$

What is the radius of a unit circle?

• $1$

• $2$

• $\frac{1}{2}$
  

• $0$

sin π/4

• $\frac{\sqrt{2}}{2}$

• $\frac{1}{2}$

• $\frac{\sqrt{3}}{2}$

• $0$
  

cos 90^o

•  $-\frac{\sqrt{3}}{2}$  

•  $1$  

• $\frac{\sqrt{3}}{2}$

•  $0$ 

What is the exact value of sin 300°

• $-\frac{1}{2}$

• $-\frac{\sqrt{3}}{2}$

• $\frac{1}{2}$

• $\frac{\sqrt{3}}{2}$

sinθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

Tags

CCSS.HSF.TF.A.3

CCSS.HSF.TF.C.8

cos 3π/4

• $-\frac{1}{\sqrt{2}}$

• $\frac{\sqrt{3}}{2}$

• $-\frac{\sqrt{3}}{2}$

• $\frac{1}{\sqrt{2}}$
  

sin 2π/3

•  $-\frac{1}{2}$  

•  $\frac{1}{2}$  

• $\frac{\sqrt{3}}{2}$

• $-\frac{\sqrt{3}}{2}$

cosθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

Tags

CCSS.HSF.TF.A.3

CCSS.HSF.TF.A.4

CCSS.HSF.TF.C.8